Danfoss VLT HVAC Drive FC Installation Guide
- June 12, 2024
- Danfoss
Table of Contents
Danfoss VLT HVAC Drive FC Installation Guide
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1 Instructions
1.1 Safety and Installation Awareness
Before starting installation, read and understand this installation guide while paying attention to all safety guidelines and precautions. Additional resources such as the operating guide, design guide, and programming guide can be accessed by scanning the QR code on the front cover. MyDrive® ecoSmartTM, and pc tools can be downloaded at www.danfoss.com.
1.2 Target Group and Necessary Qualifications
Correct and reliable transport, storage, installation, operation, and maintenance are required for the trouble-free and safe operation of the drive. Only skilled personnel are allowed to perform all related activities for these tasks. Skilled personnel are defined as properly trained staff, who are familiar with and authorized to install, commission, and maintain equipment, systems, and circuits in accordance with pertinent laws and regulations. Also, the skilled personnel must be familiar with the instructions and safety measures described in this manual and the other product-specific manuals. Non- skilled electricians are not allowed to perform any electrical installation and troubleshooting activities.
Only Danfoss authorized, skilled personnel are allowed to repair this equipment. Further training is required to perform the activities related to repair.
1.3 Safety Symbols
⚠ DANGER ⚠
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
⚠ WARNING ⚠
Indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
⚠ CAUTION ⚠
Indicates a hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE
Indicates information considered important, but not hazard-related (for
example, messages relating to property damage).
1.4 General Safety Precautions
⚠ WARNING ⚠
LACK OF SAFETY AWARENESS
This document gives important information on how to prevent injury and damage
to the equipment or the system. Ignoring this information can lead to death,
serious injury, or severe damage to the equipment.
– Make sure to fully understand the dangers and safety measures present in the application.
⚠ WARNING ⚠
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or
connected on the DC terminals. Failure to perform installation, start-up, and
maintenance by skilled personnel can result in death or serious injury.
– Only skilled personnel must perform installation, start-up, and maintenance.
⚠ WARNING ⚠
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain charged even when the
drive is not powered. High voltage can be present even when the warning
indicator lights are off. Failure to wait the specified time after power has
been removed before performing service or repair work can result in death or
serious injury.
– Stop the motor.
– Disconnect all power sources, including permanent magnet type motors.
– Wait for capacitors to discharge fully. The discharge time is shown on the
exterior of the drive.
– Measure the voltage level to verify full discharge.
⚠ WARNING ⚠
UNINTENDED START
When the drive is connected to the AC mains or connected on the DC terminals,
the motor may start at any time, causing risk of death, serious injury, and
equipment or property damage.
– Stop the drive and motor before configuring parameters.
– Make sure that the drive cannnot be started by external switch, a fieldbus
command, an input reference signal from the control panel, or after a cleared
fault condition.
– Disconnect the drive from the mains whenever safety considerations make it
necessary to avoid unintended motor start.
– Check that the drive, motor, and any driven equipment are in operational
readiness.
⚠ CAUTION ⚠
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive
is not properly closed.
– Ensure that all safety covers are in place and securely fastened before applying power.
1.5 Electrical Installation Precautions
Before starting electrical work on the drive, lock out and tag out all power sources to the drive.
⚠ WARNING ⚠
ELECTRICAL SHOCK AND FIRE HAZARD RCD COMPLIANCE
The drive can cause a DC fault current in the PE conductor. Failure to use a
Type B residual current-operated protective device (RCD) can lead to the RCD
not providing the intended protection and therefore can result in death, fire,
or other serious hazard.
– When an RCD is used for protection against electrical shock or against fire, only a Type B device is allowed on the supply side.
⚠ WARNING ⚠
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge
equipment capacitors, even with the equipment turned off and locked out/tagged
out. Failure to run output motor cables separately, or to use shielded cables,
could result in death or serious injury.
– Run output motor cables separately or use shielded cables.
– Simultaneously lock out/tag out all the drives.
⚠ WARNING ⚠
ELECTRICAL SHOCK HAZARD – LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to connect the drive properly to
protective earth (PE) can result in death or serious injury.
– Ensure reinforced protective earthing conductor according to IEC 60364-5-54
cl. 543.7 or according to local safety regulations for high touch current
equipment. The reinforced protective earthing of the drive can be done with:
– a PE conductor with a cross-section of at least 10 mm2 (8 AWG) Cu or 16 mm2
(6 AWG) Al.
– an extra PE conductor of the same cross-sectional area as the original PE
conductor as specified by IEC 60364-5-54 with a minimum cross-sectional area
of 2.5 mm2 (14 AWG) (mechanically protected) or 4 mm2 (12 AWG) (not
mechanically protected).
– a PE conductor completely enclosed with an enclosure or otherwise protected
throughout its length against mechanical damage.
– a PE conductor part of a multi-conductor power cable with a minimum PE
conductor cross-section of 2.5 mm2 (14 AWG) (permanently connected or
pluggable by an industrial connector. The multi-conductor power cable shall be
installed with an appropriate strain relief).
– NOTE: In IEC/EN 60364-5-54 cl. 543.7 and some application standards (for
example IEC/EN 60204-1), the limit for requiring reinforced protective
earthing conductor is 10 mA leakage current.
⚠ CAUTION ⚠
THERMISTOR INSULATION
Risk of personal injury or equipment damage.
– To meet PELV insulation requirements, use only thermistors with reinforced or double insulation.
NOTICE
EXCESSIVE HEAT AND PROPERTY DAMAGE
Overcurrent can generate excessive heat within the drive. Failure to provide
overcurrent protection can result in risk of fire and property damage.
– Additional protective devices such as short circuit protection or motor
thermal protection between drive and motor is required for applications with
multiple motors.
– Input fusing is required to provide short circuit and overcurrent
protection. If fuses are not factory-supplied, the installer must provide
them.
NOTICE
PROPERTY DAMAGE
Protection against motor overload is not included in the default setting. The
ETR function provides class 20 motor overload protection. Failure to set the
ETR function means that motor overload protection is not provided and property
damage can occur if the motor overheats.
– Enable the ETR function. See the programming guide for more information.
1.6 Safe Operation
When operating the unit, use the operating guide and programming guide for guidance and safety instructions.
- The drive is not suitable as the only safety device in the system. Make sure that additional monitoring and protection devices on drives, motors, and accessories are installed according to the regional safety guidelines and accident prevention regulations.
- Keep all doors, covers, and terminal boxes closed and securely fastened during operation.
1.7 Verifying the Shipment and the Contents
Make sure that the items supplied and the information on the nameplate on the drive exterior match the order.
NOTICE
The type code is used in the fuse table. Write down the type code (T/C) and serial number (S/N) for future reference.
Illustration 1: Example of the Type Code on the Nameplate
1 Type code
2 Certifications
3 Protection rating
4 Bar code for manufacturer use
5 Certifications
6 Serial number
7 Enclosure type and IP protection rating, maximum ambient temperature without
derating
8 Output voltage, frequency, and current (at low/high voltages)
9 Input voltage, frequency, and current (at low/high voltages)
10 Power rating
11 Code number
1.8 Further Items Required
- 1 adapter plate
- 1 gasket, used between motor adapter plate and drive
- 1 motor connector
- 4 screws for fastening drive to adapter plate
- 4 screws for fastening motor adapter plate to motor
- Crimp terminals
- AMP standard power timer contacts female
- 3 pieces for motor terminals U, V, and W
- 2 pieces for thermistor (optional)
- 1 piece for grounding terminal
- 2 guiding pins (optional)
1.9 EMC-compliant Installation
For more information, refer to the operating guide.
- Use shielded cables for motor and control wiring.
- Connect the shield to the enclosures at both ends. If the shield connection points have a voltage potential difference, connect a low impedance equalizing wire parallel to the shielded cable. Otherwise, break the shield connection on 1 end to prevent ground current loops.
- Avoid installation with twisted shield ends (pigtails), since this type of installation ruins the shield effect at high frequencies. Use the cable clamps provided instead.
- Ensure the same potential between drive and ground potential of the PLC.
- Use star washers and galvanically conductive installation plates.
2 Illustrations
Danfoss A/S
Ulsnaes 1
DK-6300 Graasten
vlt-drives.danfoss.com
Danfoss can accept no responsibility for possible errors in catalogs, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
References
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